Flower profile
California aster
Corethrogyne filaginifolia
California aster is a wildflower that USDA PLANTS lists as native in the lower 48 states. In California it's most often seen in bloom in July–December.
*iNaturalist research-grade observations, as of October 17, 2026.
On our lists for: California
Quick look
Corethrogyne is a monotypic genus of flowering plant in the family Asteraceae. Its only species is Corethrogyne filaginifolia, known by the common names common sandaster and California aster. Note that Symphyotrichum chilense shares its common name of California aster.
- It belongs to the Asteraceae family. iNaturalist
- USDA PLANTS describes it as an herb (forb) / a subshrub with a perennial life cycle. USDA PLANTS
- USDA PLANTS lists it as native in the lower 48 states and records it in 2 states. USDA PLANTS
- NatureServe lists it as native to California. NatureServe
- In California, most iNaturalist sightings of it in flower come in July–December. iNaturalist
- iNaturalist has 11,934 research-grade sightings of it in California, ranking #73 among the 110 flowers on our California list. iNaturalist
California aster gift ideas
Handmade california aster gifts from independent makers.
🌱 Sample spot. Handmade gift picks from independent shops will appear here once our shop partnership is approved. These cards are placeholders, not real products.
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California aster art print
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California aster greeting card
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California aster mug
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California aster earrings
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California aster embroidery pattern
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California aster sticker
When does it bloom?
In California, most flowering sightings come in July–December.
Conservation status
- Federal (U.S. ESA)
- Not listed No U.S. Endangered Species Act listing in the USFWS ECOS database. USFWS ECOS
- NatureServe global
- G4 Apparently secure worldwide. NatureServe
- California
- Not listed Not on California state-listed endangered, threatened and rare plants (14 CCR § 670.2), per CDFW's CNDDB list (July 2026). NatureServe: SNR, not yet ranked in California. CNDDB listed plants (July 2026)
- Rare elsewhere
- No other U.S. state ranks it S1, S2, SH or SX.
Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.
Can you eat it?
None of the sources we checked (NC State Extension (no page for this plant), USDA PLANTS) say whether it's edible or poisonous for people.
It isn't on the ASPCA plant list.
🌿 Never eat a wild plant unless you're certain of its ID; this isn't medical advice. Worried about a person? Call Poison Control at 1-800-222-1222. Worried about a pet? Call your vet.
Where does it grow?
USDA PLANTS records California aster in 2 states.
recorded by USDA PLANTS on our state lists not recorded
See the full list of states
California, Oregon.
California counties with USDA records: Alameda, Amador, Del Norte, Fresno, Humboldt, Inyo, Kern, Los Angeles, Madera, Marin, Mariposa, Mendocino, Merced, Monterey, Orange, Riverside, San Benito, San Bernardino, San Diego, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Sonoma, Tulare, Tuolumne, Ventura.
More California flowers
Sources
- USDA, NRCS. PLANTS Database, profile COFI2.
- iNaturalist, Corethrogyne filaginifolia: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
- Wikipedia, Corethrogyne (lead quoted under CC BY-SA 4.0).
- California: California state-listed endangered, threatened and rare plants (14 CCR § 670.2), per CDFW's CNDDB list (July 2026).
- California: California noxious weed species (3 CCR § 4500).
- USFWS, ECOS species database (ESA listing check), October 17, 2026.
- NatureServe Explorer, Corethrogyne filaginifolia (global and state ranks).
- Edibility and toxicity: no source found (marked "not well documented").
- Photo: Ken-ichi Ueda via iNaturalist · CC BY 4.0 · resized.